Kala Namak (also known as Feng Shui Arabian Black Sea Salt Crystals, Himalayan Black Salt or Indian Black Salt in English) is a type of Rock Salt, which is generally dark reddish black in color and has pungent smell and sulfurous odor. The powder of Kala Namak has pinkish gray or light purple color. Feng Shui Arabian Black Sea Salt Crystals Are Good for For Vastu & Feng Shui: A powerful crystal for both psychic protection and cleansing dark energy. It eradicates the negative energy in the house/ office --- for results, add in a bit of salt to the water that is used to clean the floor. Salt baths are also useful for removing foul feelings and energies when you've been around negative people. Another way is, to you is to put a few crystals of black salt into your wallet. Negative energy remover for home. Kala Loon, Black salt, Himalayan Black Salt, Namak Kala mainly contains Sodium Chloride and traces of various minerals and chemical compounds such as Sodium sulfate (Na2SO4), magnesia (MgO), iron in form of ferrous sulfate (FeSO4), greigite (Fe3S4), ferric oxide, etc. Kala Namak is digestive stimulant, which means it balances natural production of acids in the stomach and stimulates bile production in the liver. It helps digesting foods and increases appetite. In ayurveda, it is used with TRIKATU (three pungent spices including black pepper, ginger and long pepper). People with acidity, heartburn or ulcer should avoid this mixture, but they can take Kala Namak alone. Kala Namak is also beneficial for acidity and heartburn. It is best to use it with coriander seeds powder, cumin seed powder and fennel seeds powder in equal proportion for maximum benefits in acidity and heartburn. Black Salt reduces intestinal gas and flatulence due to its anti-flatulent characteristic. It also helps heaviness in the abdomen after meal. Black Salt contains small amounts of iron compounds, which are highly beneficial for iron deficiency anemia.